Dietary true digestible calcium to phosphorus ratio affects phosphorus utilization and renal sodium and phosphate co‐transporter gene expressions in post‐weaned pigs
Bibliographic record
Abstract
This study was conducted with 36 Yorkshire weanling barrows of average initial and final BW of 11.5 and 17.7 kg and the pigs were fed six diets for six blocks according to a completely randomized block design. The six diets were corn and SBM‐based and contained six true fecal digestible Ca to true fecal digestible P ratios (diet 1, 0.56:1; diet 2, 0.68:1; diet 3, 0.96:1; diet 4, 1.35:1, diet 5, 1.46:1, and diet 6, 1.94:1) formulated by supplementing gradient levels of limestone. Each experimental period consisted of 15 d with 10‐day adaptation and 4‐day collection of representative fecal and urinary samples as well as total volumes of urinary excretions. Changes in the dietary Ca to P ratio had quadratic effects ( P = 0.02) on average daily feed intake and average daily gain with optimal responses occurred in diets 3 and 4. Increases in the dietary Ca to P ratio had quadratic effects ( P < 0.05) on the efficiency of digestive and post‐absorptive utilization of dietary P with optimal responses observed for diets 3 and 4. Renal sodium‐phosphate co‐transporter gene IIa (NaPi‐IIa) and III (NaPi‐III) mRNA expressions were linearly affected ( P < 0.05), while the jejunal NaPi‐IIc and NaPi‐III mRNA abundances were not affected ( P > 0.05) by changes in the dietary Ca to P ratio. In conclusion, changes in the dietary Ca to P ratio have significant effects on growth performance, and efficiency of P utilization. Dietary true digestible Ca to true digestible P ratio of 0.96:1 to 1.35:1 should be used to guide the formulation of diets for the post‐weaned pig. Supported by OMAFRA and NSERC.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".